Explore letter-grade policies and equal-credit grade mixes →
A grade-point average loses information
A school can map several different percentage marks to the same letter grade and grade-point value. Once those values are averaged, the original percentages cannot be recovered. Different transcripts can therefore produce the same GPA.
Why GPA divided by 4 times 100 is misleading
For a 4.0 maximum, that formula measures the numeric GPA as a share of its scale. It is not your course percentage, a percentile among students, or a validated international credential conversion. A GPA of 3.0 does not automatically mean a 75% average.
A percentage-to-GPA table works in only one direction
College Board shows an illustrative whole-letter table and explicitly notes that schools use different grading methods. A course-level table can map an original percentage to points under a stated rule; it cannot recover a unique original percentage from the resulting average. Plus/minus values and course credits can also change the result.
What to do when a form requests a percentage
Read the institution’s current reporting instructions. Use your original transcript percentage when one is provided. If the form requires a conversion, use the exact method that receiving institution specifies; do not invent a universal conversion or substitute a CGPA rule from another country.
Official references
College Board: how the 4.0 GPA scale works ↗
Sources checked August 31, 2026. Institution examples are limited to the stated scope; review the current official policy before acting.
ILLUSTRATIVE EXAMPLE
Put the numbers together
In an illustrative rule where all marks from 90 to 100 map to 4.0 points, an equal-credit record of 90 and 90 and a record of 100 and 100 both produce 4.0 GPA. Their original percentage averages are different, so 4.0 alone cannot tell you which one you earned.
Method and limits
These examples use stated mathematical assumptions, not a claim that every institution uses the same policy. Read our methodology or check the available institution-specific profiles. Your transcript is the official record.